ES 1.0.0 M1 (Part 2)

Fixes:
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- It is not possible to specify connection details of Data Publisher (url: https://wso2.org/jira/browse/STORE-390)
 This issue was resolved by adding a dataPublisherConnectionInfo property to the social.json file.The property allows the host,port,username and password to specified.These details are provided to the ActivityPublisher by the newly added configurePublisher method.If the user does not call configurePublisher then default values of username="admin", password=admin,  host=localhost and port=7613 are used